1,4-Diaminobenzene-2-Sulfonic Acid
Also known as 4-amino-2-aminobenzenesulfonic acid, this aromatic diamine with a sulfonic acid substituent is specifically named in HTS 2921.59.1700. It serves as a key building block for azo dyes and pharmaceutical intermediates.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If derived from toluene diamine without sulfonic group
Aniline derivatives lacking polyamine characteristics or sulfonic substitution classify under earlier 2921.42 headings.
If containing organo-sulfur directly linked beyond sulfonation
Chapter notes exclude sulfonated derivatives from 2930; pure sulfonic acids remain in amine-function headings.
If imported as organic derivative for specific saccharide use
Sugar amines/ethers move to 2940-2942 per chapter exclusions.
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Import Tips & Compliance
• Include detailed spectral analysis (NMR, IR) in documentation to distinguish from similar aniline derivatives
• Check for REACH-like compliance; provide safety data sheets highlighting amine and sulfonic acid hazards
Related Products under HTS 2921.59.17.00
4,4'-Benzidine-2,2'-Disulfonic Acid
4,4'-Benzidine-2,2'-disulfonic acid is a specific aromatic polyamine derivative with two sulfonic acid groups, explicitly listed under HTS 2921.59.1700. It is a chemically defined organic compound used primarily as an intermediate in dye and pigment synthesis.
4,4'-Methylene bis(2,6-Diethylaniline)
This diarylamine compound featuring a methylene bridge between two substituted aniline rings is explicitly covered by HTS 2921.59.1700 as an aromatic polyamine. It functions as an antioxidant intermediate and polymer modifier.
m-Xylene Diamine
m-Xylene diamine (2,4-diaminotoluene) is a meta-substituted xylylene diamine explicitly listed under HTS 2921.59.1700 for aromatic polyamines. It is widely used in epoxy resin curing agents and polyimide synthesis.
3,3'-Diaminobenzidine (Tetraaminobiphenyl)
3,3'-Diaminobenzidine, a tetrafunctional aromatic polyamine also called tetraaminobiphenyl, is named in HTS 2921.59.1700. It is essential for polybenzimidazole polymers and high-performance engineering plastics.
4,4'-Methylene bis(2,6-Diisopropylaniline)
This sterically hindered diarylamine with isopropyl substituents is specifically identified in HTS 2921.59.1700. It functions as a high-performance antioxidant stabilizer for polyolefins and synthetic lubricants.
4,4'-Methylene bis(3-Chloro-2,6-Diethylaniline)
A chlorinated derivative of methylene dianiline explicitly listed under HTS 2921.59.1700, featuring both chloro and ethyl substituents. Used in specialty polymer antioxidants and flame retardant synergists.